JP6689982B2 - Data transmission method, terminal device, and network device - Google Patents

Description

  The present invention relates to the field of communications, and more particularly, to a data transmission method, a terminal device, and a network device.

  In the future communication technology, with the continuous development of air interface technology and applications, the reduction of delay is one of the important indicators of performance. For example, an end-to-end delay in real-time remote computing for mobile terminals of a mobile terminal is required to be less than 10 ms, and a delay in a high efficiency and safety service (Traffic efficiency and safety) is required to be 5 ms. On the other hand, the time length of the transmission time interval (TTI) in the current Long Term Evolution technology (LTE: Long Term Evolution) is 1 ms.

  Since the delay in data processing and decoding mainly relates to the length of the TTI, one of the key techniques for reducing the transmission delay is to shorten the TTI. At present, in Release 13 (Rel-13: Release 13) of the evolved long-term evolution (LTE-Advanced, LTE-A), a study on data transmission in a shorter TTI is about to be started. The advantage of using a short TTI is to reduce the transmission delay, but the overhead for controlling the signaling is high and the spectrum efficiency is low. For a terminal having a plurality of service types, resources are wasted when a unified TTI is determined based on the service with the lowest delay requirement. In addition, it is not possible to guarantee compatibility with the current LTE system in a carrier wave that supports transmission with a short TTI, that is, it is not possible to support a TTI of 1 ms.

  Embodiments of the present invention provide a data transmission method, can dynamically support multiple TTIs on the same carrier to perform data transmission, meet delay requirements, and be compatible with existing systems. Can be considered.

In the first aspect, a data transmission method is provided,
The terminal device receives the first downlink control information (DCI) and the second DCI;
The terminal device establishes a priority relationship between the first DCI and the second DCI;
The terminal device receives the first PDSCH or the second PDSCH on the target carrier based on the priority relationship;
Including,
Here, the terminal device is configured such that the first DCI receives a first physical downlink shared channel (PDSCH) transmitted on a target carrier using a first transmission time interval (TTI). Used for scheduling, a second DCI is used for scheduling the terminal device to receive a second PDSCH for transmission using a second TTI on the target carrier, and The first TTI is less than the second TTI and the first PDSCH at least partially overlaps the second PDSCH in time resources.

  As can be seen from the above, the method provided in the embodiments of the present invention can dynamically support multiple TTIs on the same carrier to perform data transmission, and the terminal device can transmit data in one subframe. Channel priorities can be established and the method not only meets delay requirements but also considers compatibility with current systems.

  Combining the first aspect and determining the priority relationship between the first DCI and the second DCI in the first possible embodiment is the first DCI and the second DCI. Determining a priority relationship between the first DCI and the second DCI based on a priority of a radio network temporary identifier (RNTI).

  Here, the priority order of the RNTI includes a first RNTI priority order and a second RNTI priority order. The first RNTI priority includes any one or more of system information RNTI, paging RNTI, random access RNTI, and temporary RNTI, and the second RNTI priority is cell RNTI, quasi-static. It includes any one or more of the scheduling RNTIs.

Combining the first aspect or the first possible embodiment of the first aspect, in a second possible embodiment of the first aspect, the priority of said first DCI and said second DCI. Establishing a relationship is
Determining that the priority of the first DCI is the first priority if the priority of the RNTI of the first DCI belongs to the first RNTI priority;
Determining that the priority of the first DCI is the second priority when the priority of the RNTI of the first DCI belongs to the second RNTI priority;
Determining that the priority of the second DCI is the first priority when the priority of the RNTI of the second DCI belongs to the first priority of the RNTI;
Determining that the priority of the second DCI is the second priority when the priority of the RNTI of the second DCI belongs to the second priority of the RNTI;
including.

Combining the first aspect or any one of the above possible embodiments of the first aspect, in a third possible embodiment of the first aspect, in the target carrier based on the priority relationship Receiving the first PDSCH or the second PDSCH,
Receiving the first PDSCH on the target carrier when the priority of the first DCI is the first priority and the priority of the second DCI is the second priority; and
Receiving the second PDSCH on the target carrier when the priority of the first DCI is the second priority and the priority of the second DCI is the first priority;
including.

Combining the first aspect or any one of the above possible embodiments of the first aspect, in a fourth possible embodiment of the first aspect, in the target carrier, based on the priority relationship, Receiving the first PDSCH or the second PDSCH,
When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. And receiving the first PDSCH on the target carrier when the priority is the priority and the priority of the second DCI is the second priority.

Combining the first aspect or any one of the above possible embodiments of the first aspect, in a fifth possible embodiment of the first aspect, said method comprises
The terminal device transmits positive / negative acknowledgment (ACK / NACK) information corresponding to the received PDSCH, or
The terminal device transmits ACK / NACK information corresponding to the received PDSCH and NACK information corresponding to the PDSCH that has not been received,
Including,
Here, when the received PDSCH is the first PDSCH, the unreceived PDSCH is the second PDSCH, and when the received PDSCH is the second PDSCH, the reception is possible. The PDSCH that is not present is the first PDSCH.

In the second mode, providing a terminal device,
A receiving unit configured to receive the first downlink control information (DCI) and the second DCI,
A determining unit configured to determine a priority relationship between the first DCI and the second DCI received by the receiving unit;
Including,
Here, the terminal device is configured such that the first DCI receives a first physical downlink shared channel (PDSCH) transmitted on a target carrier using a first transmission time interval (TTI). Used for scheduling, a second DCI is used for scheduling the terminal device to receive a second PDSCH for transmission using a second TTI on the target carrier, and The first TTI is less than the second TTI and the first PDSCH at least partially overlaps the second PDSCH in time resources.

  The receiving unit is further configured to receive the first PDSCH or the second PDSCH on the target carrier based on the determined priority relationship of the determining unit.

  The terminal device can be configured to perform the steps performed by the terminal device of the method for data transmission in the first aspect and embodiments above.

In a third aspect, providing a terminal device,
A receiver configured to receive a first downlink control information (DCI) and a second DCI,
A processor configured to establish a priority relationship between the first DCI and the second DCI;
Wherein the first DCI receives a first physical downlink shared channel (PDSCH) transmitting on a target carrier using a first transmission time interval (TTI). Used for scheduling a terminal device, used by a second DCI for scheduling the terminal device to receive a second PDSCH transmitted using a second TTI on the target carrier. And the first TTI is less than the second TTI, and the first PDSCH at least partially overlaps the second PDSCH in time resources.

  The receiver is further configured to receive the first PDSCH or the second PDSCH on the target carrier based on the determined priority relationship of the processor.

  The terminal device can be configured to perform the steps performed by the terminal device of the method for data transmission in the first aspect and embodiments above.

In a fourth aspect, a data transmission method is provided,
The network device transmits a first downlink control information (DCI) and a second DCI;
The network device receives feedback information from the terminal device;
Wherein the first DCI receives a first physical downlink shared channel (PDSCH) transmitting on a target carrier using a first transmission time interval (TTI). A second DCI is used to schedule a device, and a second DCI is used to schedule the terminal device to receive a second PDSCH transmitted using a second TTI on the target carrier. , The first TTI is less than the second TTI, and the first PDSCH at least partially overlaps the second PDSCH in time resources.

Here, the feedback information includes positive / negative acknowledgment (ACK / NACK) information corresponding to the PDSCH received by the terminal device, or
The feedback information includes ACK / NACK information corresponding to the PDSCH received by the terminal device and NACK information corresponding to the PDSCH that the terminal device cannot receive.

  Here, when the received PDSCH is the first PDSCH, the unreceived PDSCH is the second PDSCH, and when the received PDSCH is the second PDSCH, the reception is possible. The PDSCH that is not present is the first PDSCH.

Combining the fourth aspect, in one possible embodiment, the network device is configured to provide the first DCI and the second DCI based on a priority of a radio network temporary identifier (RNTI). Establishing a priority relationship between the first DCI and the second DCI;
The network device determines that the received PDSCH is the first PDSCH or the second PDSCH based on the priority relationship;
Further includes.

In a fifth aspect, providing a network device,
A transmitting unit configured to transmit the first downlink control information (DCI) and the second DCI,
A receiving unit configured to receive feedback information from the terminal device,
Wherein the first DCI receives a first physical downlink shared channel (PDSCH) transmitting on a target carrier using a first transmission time interval (TTI). A second DCI is used to schedule a device, and a second DCI is used to schedule the terminal device to receive a second PDSCH transmitted using a second TTI on the target carrier. , The first TTI is less than the second TTI, and the first PDSCH at least partially overlaps the second PDSCH in time resources.

  The terminal device can be configured to perform the steps performed by the network device of the method for data transmission in the fourth aspect and embodiments described above.

In a sixth aspect, providing a network device,
A transmitter configured to transmit a first downlink control information (DCI) and a second DCI,
A receiver configured to receive feedback information from the terminal device,
Wherein the first DCI receives a first physical downlink shared channel (PDSCH) transmitting on a target carrier using a first transmission time interval (TTI). A second DCI is used to schedule a device, and a second DCI is used to schedule the terminal device to receive a second PDSCH transmitted using a second TTI on the target carrier. , The first TTI is less than the second TTI, and the first PDSCH at least partially overlaps the second PDSCH in time resources.

  The terminal device can be configured to perform the steps performed by the network device of the method for data transmission in the fourth aspect and embodiments described above.

  In a seventh aspect, a computer chip is provided that includes an input interface, an output interface, at least one processor, a storage device, the processor configured to execute code in the storage device, and the code executed. If so, it is possible for the processor to implement the steps performed by the terminal device of the method for data transmission in the first aspect and embodiments above.

  In an eighth aspect, there is provided a computer chip, including an input interface, an output interface, at least one processor, a memory device, the processor configured to execute code in the memory device, the code executing. If so, it is possible for the processor to implement the steps performed by the terminal device of the method for data transmission in the fourth aspect and embodiments.

  In a ninth aspect, a computer-readable storage medium is provided, and a program is stored in the computer-readable storage medium, and the program is stored in a terminal device, the first aspect, and each of them. The method for data transmission according to any one of the embodiments is performed.

  In a tenth aspect, a computer-readable storage medium is provided, and a program is stored in the computer-readable storage medium, the program being stored in a terminal device, the fourth aspect, and each of the fourth aspect. The method for data transmission according to any one of the embodiments is performed.

It is a schematic diagram of one application scene in an example of the present invention. 3 is a schematic flowchart of a data transmission method according to an embodiment of the present invention. (A) And (b) is one schematic diagram of the relationship between the 1st PDSCH and the 2nd PDSCH in the Example of this invention. (A) And (b) is one schematic diagram of the 1st PDSCH reception in the Example of this invention. (A) And (b) is one schematic diagram of the 2nd PDSCH reception in the Example of this invention. (A) And (b) is the 1st schematic diagram of the feedback to the base station in the Example of this invention. 7 is another schematic flowchart of a data transmission method according to an embodiment of the present invention. It is a block diagram of the terminal device in one Example of this invention. It is another block diagram of the terminal device in one Example of this invention. It is a schematic block diagram of the system chip in one Example of this invention. 7 is another schematic flowchart of a data transmission method according to an embodiment of the present invention. It is a block diagram of the network device in one Example of this invention. It is another block diagram of the network device in one Example of this invention. It is another schematic block diagram of the system chip in one Example of this invention.

  In order to describe the embodiments of the present invention more clearly, the drawings required for describing the embodiments or the prior art are briefly described above, and clearly the drawings described above are merely the present invention. Other embodiments of the present invention can be obtained based on these drawings without any creative efforts for those skilled in the art.

  In the following, the technical solutions of the embodiments of the present invention will be clearly and fully described by combining the drawings of the embodiments of the present invention, and naturally, the described embodiments are some embodiments of the present invention. But not all examples. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

  FIG. 1 is a schematic diagram of one application scene of the present invention. In FIG. 1, the terminal device 20 can communicate with the base station 10. In addition, the arrows in FIG. 1 indicate uplink / downlink transmission performed via the cellular link between the terminal device 20 and the base station 10.

  It should be understood that the technical solutions in the embodiments of the present invention include various communication systems such as a Global System of Mobile Communication (GSM) system and a Code Division Multiple Access (CDMA) system. , Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, Long Term Evolution (LTE) Long Term Eq. Division Duplex) system, LT Time division duplex (TDD: Time Division Duplex) system, Universal Mobile Telecommunications System - can be applied to (UMTS Universal Mobile Telecommunication System) or the like.

  In the embodiments of the present invention, the base station may be a base station (BTS: Base Transceiver Station) in the GSM system or CDMA, a base station (NodeB) in the WCDMA system, or an LTE system. It may be an evolved base station (Evolutional Node B, "eNB" or "eNodeB"), or a base station device in future 5G networks, etc., and the invention is not limited thereto. The base station may be referred to as a network device, a network side device, or the like.

  In the embodiment of the present invention, the terminal device can communicate with one or more core networks (Core Networks) via a radio access network (RAN: Radio Access Network). An access terminal, a user equipment (UE: User Equipment), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user equipment is also referred to. It is possible. The terminal device is a cellular phone, a wireless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital processing (PDA), and a wireless communication function. It may be a mobile device, a computing device or any other device that connects to a wireless modulation demodulator, an in-vehicle device, a wearable device, a terminal device in a future 5G network, and the like.

  Shortening TTI is a key technique to reduce transmission delay. At present, LTE-A Rel-13 is about to start research on data transmission in shorter TTI, but transmission in short TTI is started. It is required to ensure compatibility with the current LTE system in a carrier wave supporting H.264 and to support 1 ms TTI. In order to guarantee the transmission delay as well as to consider the efficiency of the system, in this case the terminals may be dynamically scheduled to use different TTI lengths, i.e. short TTIs are transmitted when transmitting short delay services. Use and use normal TTI when transmitting other services. However, there is currently no clear technical solution for dynamically scheduling terminals to use different TTIs. Embodiments of the present invention devise a technical solution for dynamically supporting a data transmission method in multiple TTIs.

  FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present invention. The method shown in FIG. 2 includes S201 to S204.

  In S201, the base station 10 transmits a Physical Downlink Control Channel (PDCCH) to the terminal device 20.

  Specifically, the base station 10 can transmit the PDCCH by adopting the method defined in the current protocol. The PDCCH may include first downlink control information (DCI: Downlink Control Information), and the first DCI is transmitted on a target carrier using a first TTI. It is used to schedule the terminal device 20 to receive a downlink shared channel (PDSCH: Physical Downlink Shared Channel).

  That is, the first DCI is a scheduling for the first PDSCH waiting for transmission, the first PDSCH waiting for transmission is transmitted on the target carrier, and the first PDSCH waiting for transmission uses the first TTI. To transmit.

  Optionally, the PDCCH further comprises a second DCI for scheduling the terminal device 20 to receive the second PDSCH transmitted using the second TTI on the target carrier. Used for.

  In the embodiment of the present invention, the first PDSCH partially overlaps with the second PDSCH in the time resource, and as shown in FIGS. 3A and 3B, the horizontal direction of FIG. 3 indicates the time resource. ing. Further, in FIG. 3A, the PUCCH includes the first DCI and the second DCI. In FIG. 3B, the PUCCH includes the first DCI but does not include the second DCI.

  Note that the first TTI is not equal to the second TTI. For example, the first TTI may be less than the second TTI, or the second TTI is less than the first TTI. As an example, in the example of the latter part of the present invention, the first TTI is smaller than the second TTI.

  In S201, the terminal device 20 receives the first DCI and the second DCI transmitted from the base station 10. Specifically, the terminal device 20 may receive the first DCI and the second DCI at the same time, or the terminal device 20 may receive the first DCI and then the second DCI. Or, the terminal device 20 may receive the first DCI after receiving the second DCI, and the present invention is not limited thereto.

  In S202, the terminal device 20 establishes the priority relationship between the first DCI and the second DCI.

  The terminal device 20 may determine that the priority of the first DCI is higher or lower than the priority of the second DCI, that is, the first DCI has a different priority from the second DCI. The terminal device 20 may determine that the priority of the first DCI is equal to the priority of the second DCI, that is, the first DCI has the same priority as the second DCI.

  Specifically, in S202, the terminal device 20 determines whether the first DCI and the second DCI are the first DCI and the second DCI based on the priorities of the Radio Network Temporary Identifiers (RNTIs). Establish a priority relationship with DCI.

  As an option, in an embodiment of the present invention, the RNTI priority may include a first RNTI priority and a second RNTI priority. Here, the first RNTI priority is system information RNTI (SI-System Information RNTI), paging RNTI (P-RNTI: Paging RNTI), random access RNTI (RA-RNTI: Random Access RNTI), temporary RNTI. One of the (Temporary RNTI) may be included. Here, the second RNTI priority may include one of a cell RNTI (C-RNTI: Cell RNTI) and a quasi-static scheduling RNTI (SPS-RNTI: Semi-Persistent Scheduling RNTI).

  In addition, in the embodiment of the present invention, the RNTI priority order may be classified more finely, and includes, for example, a first RNTI priority order, a second RNTI priority order, and a third RNTI priority order. The invention is not limited to this.

  Specifically, in S202, the terminal device 20 acquires the RNTI of the first DCI and the RNTI of the second DCI, and sets the priority order of the RNTI of the first DCI and the priority order of the RNTI of the second DCI. Can be confirmed.

  In this way, the terminal device 20 sets the priority order of the first DCI and the second DCI based on the priority order of the RNTI of the first DCI and the priority order of the RNTI of the second DCI. Can be confirmed. Specifically, if the priority order of the RNTI of the first DCI belongs to the first priority order of the RNTI, it is determined that the priority order of the first DCI is the first priority order, and If the priority of the RNTI of the DCI belongs to the second RNTI priority, it is determined that the priority of the first DCI is the second priority, and the priority of the RNTI of the second DCI is determined. Belongs to the first RNTI priority, it is determined that the priority of the second DCI is the first priority, and the priority of the RNTI of the second DCI is the second RNTI priority. If it belongs to the rank, the priority of the second DCI is determined to be the second priority.

  In S203, the terminal device 20 receives the first PDSCH or the second PDSCH based on the priority relationship.

  Specifically, when the priority of the first DCI is higher than that of the second DCI, the terminal device 20 receives the first PDSCH on the target carrier. If the priority of the first DCI is lower than the priority of the second DCI, the terminal device 20 receives the second PDSCH on the target carrier.

  If the first DCI has the same priority as the second DCI, the terminal device 20 receives the PDSCH corresponding to the small TTI. By way of example, if the first DCI has the same priority as the second DCI and the first TTI is less than the second TTI, the terminal device 20 determines that the first PDSCH is on the target carrier. To receive. If the first DCI has the same priority as the second DCI and the first TTI is greater than the second TTI, the terminal device 20 receives the second PDSCH on the target carrier.

  That is, when the priority of the first DCI is the first priority and the priority of the second DCI is the second priority, the first PDSCH is received on the target carrier. As shown in (a) and (b) of FIG. 4, “x” in FIG. 4 means that the second PDSCH is not received. If the priority of the first DCI is the second priority and the priority of the second DCI is the first priority, the second PDSCH is received on the target carrier.

  When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. And receiving the first PDSCH on the target carrier if the second DCI has a second priority and the first TTI is less than a second TTI.

  When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. And receiving the second PDSCH on the target carrier if the second DCI has a second priority and the first TTI is greater than a second TTI. As shown in (a) and (b) of FIG. 5, both the first DCI and the second DCI have the second priority, and the first TTI is larger than the second TTI. “X” in FIG. 5 means that the first PDSCH is not received.

  Note that in S203, the terminal device 20 receiving the first PDSCH may be understood to mean that the terminal device 20 demodulates the first PDSCH, and similarly, the terminal device 20 receives the second PDSCH. It may be understood that the terminal device 20 demodulates the second PDSCH.

  As another example, in the situation as shown in FIG. 3B, the terminal device 20 first receives the first DCI on the PDCCH, and yet the terminal device 20 receives the first DCI. If no other DCI is detected, the terminal device 20 immediately demodulates the first PDSCH after receiving the first DCI. When the terminal device 20 is also demodulating the first PDSCH and also receives the second DCI, the terminal device 20 may execute S202 again, and the terminal device 20 determines that the priority of the first DCI is When it is determined that the priority is higher than the priority of the second DCI (for example, the priority of the first DCI is the first priority, the priority of the second DCI is the second priority, or While the first DCI has the same priority as the second DCI, but the first TTI is less than the second TTI), the terminal device 20 continues to demodulate the first PDSCH. In the terminal device 20, the priority of the first DCI is lower than the priority of the second DCI (for example, the priority of the first DCI is the second priority, and the priority of the second DCI is the second). 1 or the first DCI has the same priority as the second DCI, but the first TTI is greater than the second TTI), the terminal device 20 determines that the first PDSCH , And starts demodulation for the second PDSCH.

  Further, S204 can be included after S203.

  In S204, the terminal device 20 transmits the feedback information to the base station 10.

  Specifically, the terminal device 20 can feed back acknowledgment (ACK: Acknowledgement) or negative acknowledgment (NACK: Negative ACKnowledgement) information to the base station in the uplink subframe. Specifically, the terminal device 20 can include an ACK / NACK in an uplink physical control channel (PUCCH) or a physical uplink shared channel (PUSCH).

  For example, if the terminal device 20 receives the second PDSCH in S203, after S203, the terminal device 20 determines to the base station based on whether the reception of the second PDSCH is successful. An ACK or NACK message for the second PDSCH can be fed back. At the same time, the terminal device 20 can feed back the NACK message for the first PDSCH to the base station, or the terminal device 20 does not feed back the message for the first PDSCH to the base station. That is, the feedback from the terminal device 20 to the base station 10 can include only ACK / NACK for the second PDSCH. Alternatively, the feedback from the terminal device 20 to the base station 10 includes ACK / NACK for the second PDSCH and also includes NACK for the first PDSCH.

  For example, if the terminal device 20 receives the first PDSCH in S203, after S203, the terminal device 20 determines to the base station based on whether the reception of the first PDSCH is successful. An ACK or NACK message for the first PDSCH can be fed back. At the same time, the terminal device 20 can feed back a NACK message for the second PDSCH to the base station, or the terminal device 20 does not feed back a message for the second PDSCH to the base station. That is, the feedback from the terminal device 20 to the base station 10 may include only ACK / NACK for the first PDSCH, or the feedback from the terminal device 20 to the base station 10 may include ACK / NACK for the first PDSCH. It can be included in the NACK for the second PDSCH as well as included in the NACK. FIG. 7 is a schematic diagram of a feedback message in an uplink subframe of the terminal device 20 as shown in FIG. 6 in the case shown in FIG. 4 (a). In (a) of FIG. 6, the terminal device 20 feeds back the ACK or NACK message for the first PDSCH to the base station, but does not feed back the message for the second PDSCH to the base station. In FIG. 6B, the terminal device 20 feeds back the ACK or NACK message for the first PDSCH to the base station 10 and feeds back the NACK message for the second PDSCH to the base station 10.

  Regarding the base station 10, the base station 10 determines the priority relationship between the first DCI and the second DCI based on the priority order of the transmitted first DCI and RNTI of the second DCI. Then, it is determined whether the PDSCH received by the terminal device 20 is the first PDSCH or the second PDSCH based on the priority relationship. That is, the base station 10 can determine which PDSCH the terminal device 20 has received, based on the priority relationship between the transmitted first DCI and the second DCI, whereby the base station 10 can be determined. Can determine for which PDSCH the received feedback information is. Here, the method for the base station 10 to determine the priority relationship between the first DCI and the second DCI is the same as the method for determining the priority relationship for the terminal device 20 described above, and will be omitted here. .

  The priority order of the RNTI of the DCI may be predetermined in the standard, and the priority order of the RNTI can be stored in advance in the terminal device and the network device.

  As can be seen from the above, the method provided in the embodiments of the present invention can dynamically support multiple TTIs on the same carrier to perform data transmission, and the terminal device can transmit data in one subframe. Channel priorities can be established and the method not only meets delay requirements but also considers compatibility with current systems.

  FIG. 7 is a schematic flowchart of another data transmission method according to an embodiment of the present invention. The method shown in FIG. 7 is implemented by the terminal device, and the method includes S701 to S703.

  In S701, the terminal device receives the first DCI and the second DCI. Here, the first DCI is used to schedule the terminal device to receive the first PDSCH transmitted using the first TTI on the target carrier, and the second DCI is used. , Used for scheduling the terminal device to receive a second PDSCH transmitted using a second TTI on the target carrier, the first TTI being less than the second TTI , The first PDSCH at least partially overlaps the second PDSCH in time resources.

  In S702, the terminal device establishes a priority relationship between the first DCI and the second DCI.

  In S703, the terminal device receives the first PDSCH or the second PDSCH on the target carrier based on the priority relationship.

  Here, step S701 of FIG. 7 can refer to the description of S201 of FIG. 2 above, step S702 of FIG. 7 can refer to the description of S202 of FIG. 2 above, and step of FIG. S703 can refer to the description regarding S203 of FIG. 2 above, and is omitted here to avoid duplication.

  Optionally, after S703, the terminal device further comprises sending feedback. The feedback may include only ACK / NACK for the received PDSCH. Alternatively, the feedback may include ACK / NACK for the received PDSCH, but may also include NACK for the PDSCH that cannot be received. Here, when the received PDSCH is the first PDSCH, the PDSCH that has not been received is the second PDSCH. When the received PDSCH is the second PDSCH, the PDSCH that cannot be received is the first PDSCH.

  FIG. 8 is a block diagram of a terminal device according to an embodiment of the present invention. The terminal device 80 shown in FIG. 8 includes a receiving unit 801, a determining unit 802, and a transmitting unit 803.

  The receiving unit 801 is configured to receive a first DCI and a second DCI, wherein the first DCI is transmitted using a first TTI on a target carrier. Used to schedule the terminal device to receive the PDSCH of the second DCI to receive a second PDSCH transmitted using a second TTI on the target carrier, Used for scheduling the terminal device, the first TTI is less than the second TTI and the first PDSCH at least partially overlaps the second PDSCH in time resources.

  The determining unit 802 is configured to determine a priority relationship between the first DCI and the second DCI received by the receiving unit 801.

  The receiving unit 801 is further configured to receive the first PDSCH or the second PDSCH on the target carrier based on the determined priority relationship of the determining unit 801.

  Here, the determining unit 802 specifically determines the priority relationship between the first DCI and the second DCI based on the priority of the RNTI of the first DCI and the second DCI. Is configured to be finalized. The priority of the RNTI includes a first RNTI priority and a second RNTI priority, and the first RNTI priority is any one of system information RNTI, paging RNTI, random access RNTI, and temporary RNTI. The second RNTI priority includes one or more of a cell RNTI and a quasi-static scheduling RNTI.

As an option, the confirmation unit 802 is specifically
If the priority of the RNTI of the first DCI belongs to the first RNTI priority, it is determined that the priority of the first DCI is the first priority,
If the RNTI priority of the first DCI belongs to the second RNTI priority, it is determined that the first DCI priority is the second priority,
When the priority of the RNTI of the second DCI belongs to the first priority of the RNTI, it is determined that the priority of the second DCI is the first priority,
If the priority of the RNTI of the second DCI belongs to the second RNTI priority, it is configured to determine that the priority of the second DCI is the second priority.

  Accordingly, the receiving unit 801 may specifically receive the target when the priority of the first DCI is the first priority and the priority of the second DCI is the second priority. If configured to receive the first PDSCH on a carrier, the first DCI priority is a second priority, and the second DCI priority is a first priority, It is configured to receive the second PDSCH on the target carrier. When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. If it is the priority and the priority of the second DCI is the second priority, the first PDSCH is received on the target carrier.

  Optionally, the sending unit 803 is configured to send the feedback. The feedback may include only ACK / NACK for the received PDSCH. Alternatively, the feedback may include ACK / NACK for the received PDSCH, but may also include NACK for the PDSCH that cannot be received. Here, when the received PDSCH is the first PDSCH, the PDSCH that has not been received is the second PDSCH. When the received PDSCH is the second PDSCH, the PDSCH that cannot be received is the first PDSCH.

  It should be noted that, in the embodiment of the present invention, the receiving unit 801 may be realized by a receiver, the determination unit 802 may be realized by a processor, and the transmitting unit 803 may be realized by a transmitter. As shown in FIG. 9, the terminal device 90 can include a processor 901, a receiver 902, a transmitter 903, and a storage device 904. Here, the storage device 904 is configured to store priority information and the like, and is further configured to store code and the like to be executed by the processor 901.

  Each component of the terminal device 90 is coupled by a bus system 905, which includes a power bus, a control bus, and a status signal bus in addition to the data bus.

  FIG. 10 is a schematic configuration diagram of one of the system chips in the embodiment of the present invention. The system chip 100 of FIG. 10 includes an input interface 1010, an output interface 1020, at least one processor 1030, and a storage device 1040. Connected, the processor 1030 is configured to execute code in the storage device 1040, and when the code is executed, the processor 1030 implements the method performed by the terminal device of FIGS. 2-7. .

  The terminal device 80 shown in FIG. 8 or the terminal device 90 shown in FIG. 9 or the system chip 100 shown in FIG. 10 realizes each flow realized by the terminal device in the method embodiments of FIGS. Can be omitted here to avoid duplication.

  FIG. 11 is another schematic flow chart of the data transmission method in the embodiment of the present invention. The method of FIG. 11 includes S1101 to S1102.

  In S1101, the network device transmits the first DCI and the second DCI. Here, the first DCI is used to schedule the terminal device to receive the first PDSCH transmitted using the first TTI on the target carrier, and the second DCI is Used for scheduling the terminal device to receive a second PDSCH for transmission using a second TTI on the target carrier, the first TTI being less than the second TTI, The first PDSCH at least partially overlaps the second PDSCH in time resources.

  In S1102, the network device receives the feedback information from the terminal device.

  Here, S1101 of FIG. 11 can refer to the description of S201 of the method embodiment of FIG. 2, and S1102 of FIG. 11 can refer to the description of S204 of the method embodiment of FIG. , Omitted here to avoid duplication.

  The feedback information may include ACK / NACK information corresponding to the PDSCH received by the terminal device, or the feedback information may include ACK / NACK information corresponding to the PDSCH received by the terminal device, and The terminal device includes NACK information corresponding to the PDSCH that the terminal device cannot receive. Here, when the received PDSCH is the first PDSCH, the unreceived PDSCH is the second PDSCH, and when the received PDSCH is the second PDSCH, the reception is possible. The PDSCH that is not present is the first PDSCH.

  As an option, the method shown in FIG. 11 may be configured such that the first DCI and the second DCI are based on a priority of a radio network temporary identifier (RNTI) of the first DCI and the second DCI. Determining the priority relationship of the received PDSCH and determining that the received PDSCH is the first PDSCH or the second PDSCH based on the priority relationship. .

  Here, when the priority of the first DCI is the first priority and the priority of the second DCI is the second priority, the received PDSCH is the first PDSCH. Sometimes, the PDSCH that cannot be received is the second PDSCH. When the priority of the first DCI is the second priority and the priority of the second DCI is the first priority, when the received PDSCH is the second PDSCH, The PDSCH that cannot be received is the first PDSCH. When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. When the priority is the priority and the priority of the second DCI is the second priority, the received PDSCH is the first PDSCH because the first TTI is smaller than the second TTI. In some cases, the PDSCH that cannot be received is the second PDSCH. That is, the network device can determine for which PDSCH the received feedback information is based on the priority relationship between the first DCI and the second DCI.

  Specifically, the network device may store the RNTI of the first DCI and the RNTI of the second DCI in advance, and prioritize the first DCI and the second DCI based on the priority of the RNTI. The ranking relationship can be established.

  Here, the priority order of the RNTI includes a first RNTI priority order and a second RNTI priority order. The first RNTI priority includes at least one of system information RNTI, paging RNTI, random access RNTI, and temporary RNTI. The second RNTI priority includes at least one of a cell RNTI and a quasi-static scheduling RNTI.

  In this way, the network device can know which TTI the terminal device received and which PDSCH was transmitted.

  FIG. 12 is a configuration diagram of a network device according to an embodiment of the present invention. The network device 120 shown in FIG. 12 includes a transmitting unit 1201 and a receiving unit 1202.

  The transmitting unit 1201 is configured to transmit a first DCI and a second DCI, where the first DCI is transmitted using a first TTI on a target carrier. The terminal is used for scheduling a terminal device to receive a PDSCH, the second DCI is configured to receive a second PDSCH transmitted using a second TTI on the target carrier. Used for scheduling a device, the first TTI is less than the second TTI, and the first PDSCH at least partially overlaps the second PDSCH in time resources. The receiving unit 1202 is configured to receive feedback information from the terminal device.

  As an option, the network device 120 may prioritize the first DCI and the second DCI based on priorities of radio network temporary identifiers (RNTIs) of the first DCI and the second DCI. It further comprises a processing unit configured to establish a relationship and determine that the received PDSCH is the first PDSCH or the second PDSCH based on the priority relationship.

  In the embodiment of the present invention, the receiving unit 1202 may be implemented by a receiver, the transmitting unit 1201 may be implemented by a transmitter, and the processing unit may be implemented by a processor. As shown in FIG. 13, the network device 130 may include a processor 1301, a receiver 1302, a transmitter 1303, and a storage device 1304. Here, the storage device 1304 is configured to store the code and the like to be executed by the storage processor 1301. Processor 1301 is configured to execute code stored in storage device 1304. For example, it may be configured to generate the first DCI and the second DCI, and may be configured to execute the subsequent operation or the like based on the feedback information.

  Each component of the network device 130 is coupled by a bus system 1305, which includes a power bus, a control bus, and a status signal bus in addition to a data bus.

  FIG. 14 is a schematic configuration diagram of another system chip in the embodiment of the present invention. The system chip 140 of FIG. 14 includes an input interface 1410, an output interface 1420, at least one processor 1430, and a storage device 1440. The input interface 1410, the output interface 1420, the processor 1430, and the storage device 1440 are connected via a bus 1450. Connected, the processor 1430 is configured to execute code in the storage device 1440, and when the code is executed, the processor 1430 is configured to execute the code in the base station or terminal of FIGS. Implement the method performed by the device.

  The network device 120 shown in FIG. 12 or the network device 130 shown in FIG. 13 or the system chip 100 shown in FIG. 10 is the base of the method embodiment of FIGS. It is possible to implement each process implemented by a station or a terminal device and are omitted here to avoid duplication.

  The processor in the embodiments of the present invention may be an integrated circuit chip and has signal processing capability. In the implementation process, each step in the method embodiments may be completed by an integrated logic circuit of hardware in a processor or an instruction in software form. The above-described processor is a general-purpose processor, a digital signal processor (DSP), an application integrated circuit (ASIC), a programmable gate array (FPGA: Field Programmable Gate or other programmable device), or an on-site programmable gate array (FPGA). , Discrete gate or transistor logic device, discrete hardware component. Each of the disclosed methods, steps and logical block diagrams in the embodiments of the present invention can be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor or the like. The steps of combining the methods disclosed in the embodiments of the present invention may be implemented by being executed by a hardware decoding processor or completed by a combination of hardware modules and software modules in the decoding processor. be able to. The software modules may be located in mature storage media in the field such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers. The storage medium is located in the memory and the processor reads the information in the memory and, in combination with its hardware, completes the steps of the above method.

  It will be appreciated that the memory in embodiments of the invention may be volatile or non-volatile storage, or may include both volatile and non-volatile storage. Here, the non-volatile storage device is a read-only memory (ROM: Read-Only Memory), a programmable read-only memory (PROM: Programmable ROM), an erasable programmable read-only memory (EPROM: Erasable PROM), an electrically erasable programmable read It may be a dedicated memory (EEPROM: Electrically EPROM) or a flash memory. The volatile storage device may be a random access memory (RAM: Random Access Memory) that functions as an external cache memory. By way of example and not limitation, many forms of RAM are available, for example static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access. Memory (SDRAM: Synchronous DRAM), double data rate synchronous dynamic random access memory (DDRSDRAM: Double Data Rate SDRAM), enhanced synchronous dynamic random access memory (ESDRAM: Enhanced SDRAM), synchronous link dynamic random access memory (SLDRAM) : Synclink DRAM) and direct Rambus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable type of memory.

  It should be understood that each exemplary unit and algorithm step described in the embodiments disclosed herein can be combined and implemented using electronic hardware or a combination of computer software and electronic hardware. Any trader can understand. Whether these functions are implemented in the form of hardware or software depends on the specific application of the technical proposal and design constraints. Persons skilled in the art may implement the described functionality using different methods for each particular application, but such an implementation should not be considered beyond the scope of the present invention.

  For convenience and brevity of description, those skilled in the art can refer to the corresponding flows of the above method embodiments for the specific operation of the systems, devices and units described above, where I won't say more.

  In some embodiments provided herein, the disclosed systems, devices and methods may be implemented in other ways. For example, the embodiments of the apparatus described above are merely exemplary; for example, the division of the units is merely a logical functional division, and in practice other divisions may be For example, multiple units or components may be integrated or assembled into another system, or some technical features may be omitted or not implemented. Also, the reciprocal couplings or direct couplings or communicative connections of each of the explicitly or discussed components may be connected by the indirect coupling or communication of several interfaces, devices or units. It may be electrical, mechanical, or some other form.

  The units described above as separate components may or may not be physically separate. Components shown as units may or may not be physical units. It may be arranged in one place or distributed to a plurality of network units. Depending on the actual needs, some or all of the units may be selected to realize the purpose of the technical solution of this embodiment.

  Also, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be a single unit, and two or more units may be integrated into one unit. You may.

  The functions may be stored in a computer-readable storage medium when the functions are implemented in the form of software function units and when sold or used as an independent product. As a result, the technical solution of the present invention can be embodied in the form of a software product, in other words, a portion that contributes to the prior art, and the computer software product is stored in a storage medium, and a computer device (a personal computer, a server, or a network device). Etc.) may include a plurality of instructions for performing the method of all or part of each embodiment of the present invention. The above-described storage medium stores various program codes such as a USB memory, a mobile storage medium, a read-only memory (ROM: Read-Only Memory), a random access storage device (RAM: Random Access Memory), a magnetic disk or a compact disk. Including media that can.

  The above description is merely a specific embodiment of the present invention, the present invention is not limited thereto, and within the scope disclosed in the present invention by those skilled in the art, easily conceivable modifications or All permutations should be included within the scope of the present invention. Therefore, the scope of the present invention should be subject to the claims that follow.

Claims (30)

A data transmission method,
The terminal device receives the first downlink control information (DCI) and the second DCI;
The terminal device establishes a priority relationship between the first DCI and the second DCI;
The terminal device receives a first physical downlink shared channel (PDSCH) or a second PDSCH on a target carrier based on the priority relationship;
Including,
Here, the first DCI is used to schedule the terminal device to receive the first PDSCH transmitted using a first transmission time interval (TTI) on the target carrier. And a second DCI is used to schedule the terminal device to receive the second PDSCH on the target carrier for transmission using a second TTI, and the first TTI is used. Is less than the second TTI, and the first PDSCH at least partially overlaps the second PDSCH in time resources,
A data transmission method characterized by the above. Determining a priority relationship between the first DCI and the second DCI includes
Determining a priority relationship between the first DCI and the second DCI based on a priority of a radio network temporary identifier (RNTI) between the first DCI and the second DCI.
The data transmission method according to claim 1, wherein: The RNTI priority includes a first RNTI priority and a second RNTI priority,
The first RNTI priority includes any one or more of system information RNTI, paging RNTI, random access RNTI, and temporary RNTI,
The second RNTI priority includes one or more of a cell RNTI and a quasi-static scheduling RNTI.
The data transmission method according to claim 2, wherein: Receiving the first PDSCH on the target carrier based on the priority relationship includes:
Receiving the first PDSCH on the target carrier when the priority of the first DCI is the first priority and the priority of the second DCI is the second priority. ,
The data transmission method according to any one of claims 1 to 3, wherein: Receiving the second PDSCH on the target carrier based on the priority relationship comprises:
Receiving the second PDSCH on the target carrier when the priority of the first DCI is the second priority and the priority of the second DCI is the first priority. Including,
The data transmission method according to any one of claims 1 to 3, wherein: Receiving the first PDSCH or the second PDSCH on the target carrier based on the priority relationship,
When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. And receiving the first PDSCH on the target carrier when the priority of the second DCI is the second priority.
The data transmission method according to any one of claims 1 to 3, wherein: The terminal device transmits positive / negative acknowledgment (ACK / NACK) information corresponding to the received PDSCH, or
The terminal device transmits ACK / NACK information corresponding to the received PDSCH and NACK information corresponding to the PDSCH that has not been received,
Further including,
Here, when the received PDSCH is the first PDSCH, the unreceived PDSCH is the second PDSCH, and when the received PDSCH is the second PDSCH, the reception is possible. No PDSCH is the first PDSCH,
The data transmission method according to any one of claims 1 to 6, characterized in that. Further demodulating the first PDSCH after the terminal device receives the first DCI.
The data transmission method according to any one of claims 1 to 6, characterized in that. After the terminal device receives the second DCI, the first DCI has the same priority as the second DCI, and it is determined that the first TTI is greater than the second TTI. ,
The terminal device further comprises: stopping demodulation for the first PDSCH and starting demodulation for the second PDSCH.
The data transmission method according to claim 8, wherein The terminal device further comprises feeding back an ACK or NACK message for the second PDSCH and a NACK message for the first PDSCH to a network device.
10. The data transmission method according to claim 9, wherein: A data transmission method,
The network device transmits a first downlink control information (DCI) and a second DCI , the first DCI using a first transmission time interval (TTI) on a target carrier. Is used to schedule the terminal device to receive a first physical downlink shared channel (PDSCH) which is transmitted in a second DCI using a second TTI on the target carrier. Used to schedule the terminal device to receive a second PDSCH to transmit, the first TTI is less than the second TTI and the first PDSCH is the second PDSCH; At least partially overlapping in time resources ,
The network device receives feedback information from the terminal device;
In the network device, the received feedback information is for which PDSCH among the first PDSCH or the second PDSCH, based on a priority relationship between the first DCI and the second DCI. To determine if there is
The including,
A data transmission method characterized by the above. The feedback information includes positive / negative acknowledgment (ACK / NACK) information corresponding to the PDSCH received by the terminal device, or
The feedback information includes ACK / NACK information corresponding to the PDSCH received by the terminal device and NACK information corresponding to the PDSCH that the terminal device cannot receive.
Here, when the received PDSCH is the first PDSCH, the unreceived PDSCH is the second PDSCH, and when the received PDSCH is the second PDSCH, the reception is possible. No PDSCH is the first PDSCH,
The data transmission method according to claim 11, wherein: The network device establishes a priority relationship between the first DCI and the second DCI based on a priority of a radio network temporary identifier (RNTI) between the first DCI and the second DCI. What to do
The network device determines that the received PDSCH is the first PDSCH or the second PDSCH based on the priority relationship;
including,
The data transmission method according to claim 12, characterized in that. When the priority of the first DCI is the first priority and the priority of the second DCI is the second priority, when the received PDSCH is the first PDSCH, The PDSCH that cannot be received is the second PDSCH,
When the priority of the first DCI is the second priority and the priority of the second DCI is the first priority, when the received PDSCH is the second PDSCH, The PDSCH that cannot be received is the first PDSCH,
When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. When the priority is the priority and the priority of the second DCI is the second priority, the received PDSCH is the first PDSCH because the first TTI is smaller than the second TTI. At one time, the PDSCH that cannot be received is the second PDSCH,
14. The data transmission method according to claim 13, wherein: The RNTI priority includes a first RNTI priority and a second RNTI priority,
The first RNTI priority includes any one or more of system information RNTI, paging RNTI, random access RNTI, and temporary RNTI,
The second RNTI priority includes one or more of a cell RNTI and a quasi-static scheduling RNTI.
The data transmission method according to claim 13 or 14, characterized in that. A terminal device,
A receiving unit configured to receive the first downlink control information (DCI) and the second DCI,
A determining unit configured to determine a priority relationship between the first DCI and the second DCI received by the receiving unit;
Wherein the first DCI receives a first physical downlink shared channel (PDSCH) transmitting on a target carrier using a first transmission time interval (TTI). Used for scheduling a terminal device, used by a second DCI for scheduling the terminal device to receive a second PDSCH transmitted using a second TTI on the target carrier. And the first TTI is less than the second TTI and the first PDSCH at least partially overlaps the second PDSCH in time resources,
The receiving unit is further configured to receive the first PDSCH or the second PDSCH on the target carrier based on the determined priority relationship of the determining unit.
A terminal device characterized by the above. The confirmation unit is, specifically,
It is configured to establish a priority relationship between the first DCI and the second DCI based on a priority of a radio network temporary identifier (RNTI) between the first DCI and the second DCI. The
The terminal device according to claim 16, characterized in that The RNTI priority includes a first RNTI priority and a second RNTI priority,
The first RNTI priority includes any one or more of system information RNTI, paging RNTI, random access RNTI, and temporary RNTI,
The second RNTI priority includes one or more of a cell RNTI and a quasi-static scheduling RNTI.
18. The terminal device according to claim 17, characterized in that The receiving unit is specifically,
When the priority of the first DCI is the first priority and the priority of the second DCI is the second priority, the first PDSCH is received on the target carrier. Will be
The terminal device according to any one of claims 16 to 18, characterized in that: The receiving unit is specifically,
When the priority of the first DCI is the second priority and the priority of the second DCI is the first priority, the second PDSCH is received on the target carrier. Will be
The terminal device according to any one of claims 16 to 18, characterized in that: The receiving unit is specifically,
When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. If it is a priority and the priority of the second DCI is a second priority, it is configured to receive the first PDSCH on the target carrier.
The terminal device according to any one of claims 16 to 18, characterized in that: The terminal device is
Send positive / negative acknowledgment (ACK / NACK) information corresponding to the received PDSCH, or
Further comprising a transmitting unit configured to transmit ACK / NACK information corresponding to the received PDSCH and NACK information corresponding to the PDSCH that could not be received,
Here, when the received PDSCH is the first PDSCH, the unreceived PDSCH is the second PDSCH, and when the received PDSCH is the second PDSCH, the reception is possible. No PDSCH is the first PDSCH,
22. The terminal device according to claim 16, wherein the terminal device is a terminal device. The receiving unit is specifically,
Configured to demodulate the first PDSCH after receiving the first DCI
22. The terminal device according to claim 16, wherein the terminal device is a terminal device. The receiving unit is specifically,
If after determining that the first DCI has the same priority as the second DCI and the first TTI is greater than the second TTI after receiving the second DCI,
The terminal device is configured to stop demodulation for the first PDSCH and start demodulation for the second PDSCH.
The terminal device according to claim 23, characterized in that The transmitting unit is specifically
Configured to feed back to a network device an ACK or NACK message for the second PDSCH and a NACK message for the first PDSCH.
The terminal device according to claim 24, characterized in that A network device,
A transmission unit configured to transmit first downlink control information (DCI) and second DCI , the first DCI being a first transmission time interval (TTI) on a target carrier. Used to schedule a terminal device to receive a first physical downlink shared channel (PDSCH) which is transmitted using a second DCI using a second TTI on the target carrier. Used for scheduling the terminal device to receive a second PDSCH for transmission, the first TTI is less than the second TTI, and the first PDSCH is the second PDSCH. And a transmission unit that at least partially overlaps in time resources ,
A receiving unit configured to receive feedback information from the terminal device,
Based on the priority relationship between the first DCI and the second DCI, it is determined which PDSCH of the first PDSCH or the second PDSCH the received feedback information is. A processing unit configured as
The including,
A network device characterized in that The feedback information includes positive / negative acknowledgment (ACK / NACK) information corresponding to the PDSCH received by the terminal device, or
The feedback information includes ACK / NACK information corresponding to the PDSCH received by the terminal device and NACK information corresponding to the PDSCH that the terminal device cannot receive.
Here, when the received PDSCH is the first PDSCH, the unreceived PDSCH is the second PDSCH, and when the received PDSCH is the second PDSCH, the reception is possible. No PDSCH is the first PDSCH,
27. The network device according to claim 26, wherein: The processing unit is
Determining a priority relationship between the first DCI and the second DCI based on a priority of a radio network temporary identifier (RNTI) between the first DCI and the second DCI;
Further configured to determine that the received PDSCH is the first PDSCH or the second PDSCH based on the priority relationship.
The network device according to claim 27, wherein: When the priority of the first DCI is the first priority and the priority of the second DCI is the second priority, when the received PDSCH is the first PDSCH, The PDSCH that cannot be received is the second PDSCH,
When the priority of the first DCI is the second priority and the priority of the second DCI is the first priority, when the received PDSCH is the second PDSCH, The PDSCH that cannot be received is the first PDSCH,
When the priority of the first DCI is the first priority and the priority of the second DCI is the first priority, or the priority of the first DCI is the second priority. When the priority is the priority and the priority of the second DCI is the second priority, the received PDSCH is the first PDSCH because the first TTI is smaller than the second TTI. At one time, the PDSCH that cannot be received is the second PDSCH,
The network device according to claim 28, wherein: The RNTI priority includes a first RNTI priority and a second RNTI priority,
The first RNTI priority includes any one or more of system information RNTI, paging RNTI, random access RNTI, and temporary RNTI,
The second RNTI priority includes one or more of a cell RNTI and a quasi-static scheduling RNTI.
30. The network device according to claim 28 or 29, wherein

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